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v3.19.3

Leases - Additional Information (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 26, 2019 | Dec. 27, 2018
Finance Lease, Right-of-Use Asset | $ 74,348,000 | $ 72,631,000
Digital Systems [Member] |  |
Finance Lease, Right-of-Use Asset | 45,510,000 | 45,510,000
Commitment Minimum Lease Payments | 6,163,000 |
Obligation To Be Reduced In Next 12 Months | 140,000 |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 45,279,000 | $ 40,647,000
Lease Term Contract | 12 months |

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- Definition The minimum lease payment of commitment during the period. + References No definition available. + Details
Name: | mcs_CommitmentMinimumLeasePayments
Namespace Prefix: | mcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Term of lease in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | mcs_LeaseTermContract
Namespace Prefix: | mcs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of expected reduction in capital lease obligation within the next 12 months. + References No definition available. + Details
Name: | mcs_ObligationToBeReducedInNext12Months
Namespace Prefix: | mcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=mcs_DigitalSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |